66243--X
OPERATOR’S MANUAL
RELEASED: 7--7--90
REVISED: 6--4--10
(REV. F) IPP
INCLUDING: SERVICE KIT, TROUBLESHOOTING, PARTS LIST,
DISASSEMBLY AND ASSEMBLY
CHOP--CHECK STYLE
LOWER PUMP END
ALSO COVERS 637071-XXX SERVICE KIT
IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
LOWER PUMP END OPTION
DESCRIPTION CHART*
(PACKINGS ARE UPPER AND LOWER UNLESS NOTED)
66243--_X_X__X_
PACKING MATERIAL
PLUNGER TYPE
SPRING ARRANGEMENT
1 THIOKOL LEATHER -
G UHMW--PE/LEATHER STAG’D
PACKING MATERIAL
SPRING ARRANGEMENT
3 GLASS FILLED PTFE
P UHMW--PE/PTFE STAG’D (UPPER)
5 PTFE(GF)/LEATHER STAG’D (UPPER)
GLASS FILLED PTFE (LOWER) -
C UHMW--PE
D UHMW--PE/LEATHER STAG’D (UPPER)
LEATHER (LOWER) -
UHMW--PE (LOWER)
R PTFE/UHMW--PE STAG’D (UPPER)
PTFE (LOWER)
PLUNGER TYPE
3 HD SS W/HD CHROME PLATING
7 THREADED PLUNGER (LG MOTORS)
1 COIL SPRING. -
4 WAVE SPRING
5 COMPOSITE SPRING W/ADJ P’KG NUT -
-
AS OF MAY 15, 1995 NO LONGER AVAILABLE
* NOT ALL MODEL COMBINATIONS ARE AVAILABLE, REFER TO PUMP MODEL MANUAL (650XXX--XXX) FOR ‘‘ACTIVE” MODELS.
PUMP RATI0 X REGULATED = MAXIMUM FLUID PRESSURE
SERVICE KITS
PRESSURE
• The pump ratio is an expression of the relationship between the air
motor area and the lower pump end area. EXAMPLE: When 150
PSI (10.3 Bar) air pressure is supplied to the pump motor on a 3:1
ratiopump, the lower pumpendwilldevelopamaximumof 450 PSI
(31Bar)fluidpressure(atnoflow).Asthefluidcontrolisopened,the
flow rate will increase as the motor cycle rate increases to keep up
with the demand.
• Use only genuine ARO replacement parts to assure compatible-
pressure rating and longest service life.
• 637071--XXX for general repair of 66243--XXX Lower Pump End.
GENERAL DESCRIPTION
LOWER PUMP END
• Operating at excessive pressures will shorten the life of the pump.
TROUBLE SHOOTING CHOP-CHECK PUMPS
Lower Pump End Problems
WARNING DONOTEXCEEDMAXIMUMOPERATINGPRES-
SURE AS INDICATED ON PUMP MODEL PLATE
WARNING REFER TO GENERAL INFORMATION SHEET
FOR ADDITIONAL SAFETY PRECAUTlONS AND IMPORTANT
INFORMATION. (Seethepumpmodelmanual for the proper Form
No.)
• No material at outlet. (Pump continually cycles.)
Check material supply, disconnect or shut off the air supply and re-
plenish the material, reconnect.
• Material on one stroke only. (fast downstroke.)
The lower check may not be seating in the foot valve. (See lower
pump disassembly) Remove the check from the foot valve, clean
andinspectthevalveseatarea. Ifcheckorfootvalvearedamaged,
replace.
• ThisLOWERPUMPENDMANUALisoneoffourdocumentsneed-
ed to properly support an ARO pump model. Ref: Part A. 650XXX--
XXX--X MODEL (OPERATOR’S) MANUAL, Part B. GENERAL
INFORMATION, Part C. MOTOR (OPERATOR’S) MANUAL, Part
D. LOWER PUMP END (OPERATOR’S) MANUAL. These forms
are available from the factory if needed.
• TheChop--Checkdesignprovidesfareasyprimingofthelowerfoot
valve. The double acting feature is standard in all ARO industrial
pumps, material is delivered to the pump discharge outlet on both
the up and down stroke.
• Material on one stroke only. (fast upstroke.)
• Checkforwornordamagedseals. Replacethesealsasnecessary.
• Material leakage out of the solvent cup or material appears on the
pump plunger rod.
ForModels(--X5XOnly).Increasetheloadonthepackingsbytight-
ening the packing nut.
Check for worn upper packings and replace them as necessary.
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX(800) 892-6276
© 2010
LOWER PUMP END
COIL
COMPOSITE
SPRING
SPRING
UPPER
--X1X MODELS
--X5X MODELS
-- K 3 X M O D E L S
WAVE
SPRING
50
51
50
--X4X MODELS
51
52
52
53
41
75
115
42
51
52
26 L
1
n
53
43
MODELS IN SHADED
AREAS NO LONGER
AVAILABLE AS OF
MAY 15, 1995
10
MIDDLE
6
‘‘V” PACKING
(MODELS --GXX & --9XX
have staggered pkgs)
-- K 3 X M O D E L S
7
9
47
57
56
76
36
34
55
54
11
23
28
24
25
LOWER
CUP PACKING
15
39
‘‘V” PACKING
-- K 3 X
MODELS
(Models --1XX,
--AXX, --DXX)
37
65
22
23
37
35
37
35
61
59
77
21
30
21
58
31
Primer
Assembly
21
32
33
STAGGERED PACKINGS
L Threaded Version is not shown
NOTE: When using ‘‘STAGGERED”
n A 93456--1 Rod is included with unit
packings use the shaded position as shown in the
views above for the ‘‘52” and ‘‘56” packings.
66243-X
to adjust packing nut/solvent cup.
66243-X
PAGE 3 OF 4
PACKING OPTIONS AND SERVICE KITS
LOWER
PUMP
SERVICE
KIT
UPPER PACKING
MIDDLE PACKING
LOWER PACKING
51 (X) ‘‘V” PACKING 52 (2) ‘‘V PKG
55 (X) ‘‘V” PKG
56 (2) ‘‘V” PKG 59 (4) ‘‘V” PKG
65 (1)‘‘U”
PART#
[MT’L]
66243-XXX
637071-XXX
PART #
(QTY) [MT’L] PART #
[MT’L] PART #
(QTY) [MT’L] PART #
[MT’L] PART #
[MT’L]
637071-G43,-G47
637071-G43,-G47
637071-G43,-G47
637071-C43,-C47
637071-G43,-G47
-11X -, -15X -
-31X -,-343,-35X -
-51X -,-55X -
-C1X -,-C4X,-C5X -
-D1X -,-D5X -
93454-1
93454-2
93454-2
93454-4
93454-4
(5)
(5)
(3)
(5)
(3)
[L]
[T]
93455-1
(4)
(4)
(4)
(4)
(4)
[L]
[T]
93678-1
[L]
93455-2
90911
90911
90911
[T]
[T]
[T]
[T]
93454-1
[L]
[L]
93455-2
93455-4
93455-1
[T]
[UH]
[UH]
[L]
[UH] 93454-1
93678-1
[L]
- As of May 15, 1995 these models are no longer available.
EXAMPLE: 66243-117 is replaced by 66243-G47 & service kit is 637071-G47.
LOWER PUMP DISASSEMBLY
Note: All threads are right hand.
ber body. Use the flat bladed screwdriver to pry on the slot on (25)
adapter.
1. Remove (6) pump body from (9) suction tube, by sliding it off three
(10) tie rods.
10. Remove (24) ‘‘O” Ring from (25) adapter.
11. With retaining ringpliers, remove (37) retaining ring from (21) valve
body, then remove the packings out of (21) valve body.
12. Using provided wrench flats, remove (30) rod from (34) valve rod.
Again, using wrench flats remove (34) valve rod from (26) plunger
rod.
2. Remove (7) gasket from top of (9) suction tube.
3. Remove three (10) tie rods.
4. Pull (9) suction tube off the MIDDLE packing and valve section and
out of (25) adapter.
5. Push (26) plunger rod to expose the primer assembly.
6. Remove(33) nut, (32) valveplateand(31) washerfrom (30)primer
rod.
CAUTION: DO NOT mar or damage surfaces of any of these rods.
13. Slide the MIDDLE packing assembly off (34) valve rod.
14. Clamp(34)valveseatinaviseandremove(36)valveseatnut,then
remove the MIDDLE packing assembly off (28) valve seat.
15. Remove (1) solvent cup from (6) pump body. Now remove UPPER
packing assembly out (6) pump body.
7. Pull (26) plunger rod and remove MIDDLE packing, valve section
and (30) rod from (15) chamber body.
8. Remove (7) gasket out of (25) adapter.
9. With the aid of a flat bladed screwdriver remove (25) adapter, (21)
valve body, (22) valve seat and two (23) gaskets out of (15) cham-
LOWER PUMP REASSEMBLY
Note: All rubber goods and packings should be lubricated with a com-
patible lubricant prior to assembly.
14. Lubricate the MIDDLE packing assy and the inside of (9) suction
tube. Carefullyslide(9)suctiontubeover(26)plungerandMIDDLE
packing assy into (15) adapter.
1. Assemble(21)valvebodywithLOWER packings. Refer toPacking
Options Chart on page 2.
15. Install three (10) tie rods.
16. Place (7) gasket on end of (9) suction tube. NOTE: Apply a small
amount of grease on gasket to help keep gasket in place.
17. Slide (6) pump body over (26) plunger rod onto (10) tie rods. Seat
the (9) suction tube into (6) pump body.
18. Assemble the UPPER packing onto the (26) plunger rod and slide
into (6) pump body.
19. Install (1) solvent cup and hand tighten.
20. Push (26) plunger rod to expose (30) rod at bottom of pump. Place
(31) washer, (32) plate with beveled edges away from pump and
(33) nut onto (30) rod. Tighten (33) nut.
21. Push (30) rod until rod is inside (15) chamber body. Tighten (1) sol-
vent cup.
2. Retain LOWER packing assy. in (21) valve body with (37) retaining
ring.
3. Assemble (28) valve seat MIDDLE packings. Refer to Packing Op-
tions Chart on page 2.
4. Secure the MIDDLE packing assy. with (36) valve seat nut.
5. Slide(21)valvebodywithLOWERpackingsontotheendof(30)rod
opposite the wrench flats. Install (21) valve body with the beveled
end onto rod
6. Screw (30) rod into (34) valve body and tighten.
7. Place (24) ‘‘O” Ring on (25) adapter.
8. Slide (25) adapter onto the (34) valve body & (30) rod assy with the
wider diameter opening going on first & fit it over (21) body.
9. Slide (28) valve seat and MIDDLE packing assy over (34) valve
body. Be sure to place beveled end of (28) valve seat against bevel
of (34) valve body.
10. Screw (34) valve body into (26) plunger rod and tighten. Use
wrench flats.
11. Place one (23) gasket inside (15) chamber body, followed with (22)
valve seat with beveled side up. NOTE: If stringy or filled materi
alisbeingpumped,thenreversethe(22)valveseat.Nextplace
second (23) brass gasket against top of (22) valve seat.
12. Place(26)plunger,(28)valveseatandMIDDLEpackingassyalong
with (30) rod & (25) adapter assy into (15) chamber body with the
primer rod end going in first.Slide the (25) adapter into place in the
(15) chamber body.
13. Place (7) gasket in (25) adapter.
PN 97999-070
66243-X
PAGE 4 OF 4
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